Question: What type of quantum particle is the antiparticle of an electon.
Paraphrase: What sort of quantum molecule is the antiparticle of an electon.
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P2152 wd:Q2225 . ?sbj wdt:P31 wd:Q22675015 } 
Answer: positron